Hitachi Deskstar 7K160, Технические характеристики, Страница: 48 / 298

Deskstar 7K160 Hard Disk Drive Specification
34
6.9.3 Host Terminating Read DMA
Table 23: Ultra DMA cycle timing chart (Host pausing Read)
Table 24: Ultra DMA cycle timings (Host pausing Read)
PARAMETER DESCRIP-
TION
(all values in ns)
MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
tRFS HDMARDY- to final
DSTROBE time
– 75 – 70 – 60 – 60 – 60 – 50 – 50
tRP Ready to pause time 160 – 125 – 100 – 100 – 100 – 85 – 85 –
tLI Limited interlock time 0 150 0 150 0 150 0 100 0 100 0 75 0 60
tAZ Maximum time allowed for
output drivers to release
– 10 – 10 – 10 – 10 – 10 – 10 – 10
tZAH Minimum delay time
required for output
20 – 20 – 20 – 20 – 20 – 20 – 20 –
tMLI Interlock time with minimum 20 – 20 – 20 – 20 – 20 – 20 – 20 –
tCS CRC word setup time at
device
15 – 10 – 7 – 7 – 5 – 5 – 5 –
tCH CRC word hold time at
device
5 – 5 – 5 – 5 – 5 – 5 – 5 –
tACK Hold time for DMACK- 20 – 20 – 20 – 20 – 20 – 20 – 20 –
tIO-
RDYZ
Maximum time before
releasing IORDY
– 20 – 20 – 20 – 20 – 20 – 20 – 20
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tMLI
tRP
DD(15:0)
tZAH
xxxxxxxxxxxxxxxxxx
xxx
Device drives DD
Host drives DD
tCH
tCS
CRC
tACK
tACK
tRFS
tLI tIORDYZ
xxx RD Data xxxxxxxxxxx
tAZ
tLI